roping orping rpoing proing opring poring roipng oripng riopng iropng oirpng iorpng rpiong priong ripong irpong pirong iprong opirng poirng oiprng ioprng piorng iporng ropnig orpnig rponig pronig oprnig pornig ronpig ornpig rnopig nropig onrpig norpig rpnoig prnoig rnpoig nrpoig pnroig nproig opnrig ponrig onprig noprig pnorig nporig roinpg orinpg rionpg ironpg oirnpg iornpg ronipg ornipg rnoipg nroipg onripg noripg rinopg irnopg rniopg nriopg inropg niropg oinrpg ionrpg onirpg noirpg inorpg niorpg rpinog prinog ripnog irpnog pirnog iprnog rpniog prniog rnpiog nrpiog pnriog npriog rinpog irnpog rnipog nripog inrpog nirpog pinrog ipnrog pnirog npirog inprog niprog opinrg poinrg oipnrg iopnrg pionrg iponrg opnirg ponirg onpirg nopirg pnoirg npoirg oinprg ionprg oniprg noiprg inoprg nioprg pinorg ipnorg pniorg npiorg inporg niporg ropign orpign rpoign proign oprign porign roipgn oripgn riopgn iropgn oirpgn iorpgn rpiogn priogn ripogn irpogn pirogn iprogn opirgn poirgn oiprgn ioprgn piorgn iporgn ropgin orpgin rpogin progin oprgin porgin rogpin orgpin rgopin gropin ogrpin gorpin rpgoin prgoin rgpoin grpoin pgroin gproin opgrin pogrin ogprin goprin pgorin gporin roigpn origpn riogpn irogpn oirgpn iorgpn rogipn orgipn rgoipn groipn ogripn goripn rigopn irgopn rgiopn griopn igropn giropn oigrpn iogrpn ogirpn goirpn igorpn giorpn rpigon prigon ripgon irpgon pirgon iprgon rpgion prgion rgpion grpion pgrion gprion rigpon irgpon rgipon gripon igrpon girpon pigron ipgron pgiron gpiron igpron gipron opigrn poigrn oipgrn iopgrn piogrn ipogrn opgirn pogirn ogpirn gopirn pgoirn gpoirn oigprn iogprn ogiprn goiprn igoprn gioprn pigorn ipgorn pgiorn gpiorn igporn giporn ropngi orpngi rpongi prongi oprngi porngi ronpgi ornpgi rnopgi nropgi onrpgi norpgi rpnogi prnogi rnpogi nrpogi pnrogi nprogi opnrgi ponrgi onprgi noprgi pnorgi nporgi ropgni orpgni rpogni progni oprgni porgni rogpni orgpni rgopni gropni ogrpni gorpni rpgoni prgoni rgponi grponi pgroni gproni opgrni pogrni ogprni goprni pgorni gporni rongpi orngpi rnogpi nrogpi onrgpi norgpi rognpi orgnpi rgonpi gronpi ogrnpi gornpi rngopi nrgopi rgnopi grnopi ngropi gnropi ongrpi nogrpi ognrpi gonrpi ngorpi gnorpi rpngoi prngoi rnpgoi nrpgoi pnrgoi nprgoi rpgnoi prgnoi rgpnoi grpnoi pgrnoi gprnoi rngpoi nrgpoi rgnpoi grnpoi ngrpoi gnrpoi pngroi npgroi pgnroi gpnroi ngproi gnproi opngri pongri onpgri nopgri pnogri npogri opgnri pognri ogpnri gopnri pgonri gponri ongpri nogpri ognpri gonpri ngopri gnopri pngori npgori pgnori gpnori ngpori gnpori roingp oringp riongp irongp oirngp iorngp ronigp ornigp rnoigp nroigp onrigp norigp rinogp irnogp rniogp nriogp inrogp nirogp oinrgp ionrgp onirgp noirgp inorgp niorgp roignp orignp riognp irognp oirgnp iorgnp roginp orginp rgoinp groinp ogrinp gorinp rigonp irgonp rgionp grionp igronp gironp oigrnp iogrnp ogirnp goirnp igornp giornp rongip orngip rnogip nrogip onrgip norgip rognip orgnip rgonip gronip ogrnip gornip rngoip nrgoip rgnoip grnoip ngroip gnroip ongrip nogrip ognrip gonrip ngorip gnorip ringop irngop rnigop nrigop inrgop nirgop rignop irgnop rginop grinop igrnop girnop rngiop nrgiop rgniop grniop ngriop gnriop ingrop nigrop ignrop ginrop ngirop gnirop oingrp iongrp onigrp noigrp inogrp niogrp oignrp iognrp oginrp goinrp igonrp gionrp ongirp nogirp ognirp gonirp ngoirp gnoirp ingorp nigorp ignorp ginorp ngiorp gniorp rpingo pringo ripngo irpngo pirngo iprngo rpnigo prnigo rnpigo nrpigo pnrigo nprigo rinpgo irnpgo rnipgo nripgo inrpgo nirpgo pinrgo ipnrgo pnirgo npirgo inprgo niprgo rpigno prigno ripgno irpgno pirgno iprgno rpgino prgino rgpino grpino pgrino gprino rigpno irgpno rgipno gripno igrpno girpno pigrno ipgrno pgirno gpirno igprno giprno rpngio prngio rnpgio nrpgio pnrgio nprgio rpgnio prgnio rgpnio grpnio pgrnio gprnio rngpio nrgpio rgnpio grnpio ngrpio gnrpio pngrio npgrio pgnrio gpnrio ngprio gnprio ringpo irngpo rnigpo nrigpo inrgpo nirgpo rignpo irgnpo rginpo grinpo igrnpo girnpo rngipo nrgipo rgnipo grnipo ngripo gnripo ingrpo nigrpo ignrpo ginrpo ngirpo gnirpo pingro ipngro pnigro npigro inpgro nipgro pignro ipgnro pginro gpinro igpnro gipnro pngiro npgiro pgniro gpniro ngpiro gnpiro ingpro nigpro ignpro ginpro ngipro gnipro opingr poingr oipngr iopngr piongr ipongr opnigr ponigr onpigr nopigr pnoigr npoigr oinpgr ionpgr onipgr noipgr inopgr niopgr pinogr ipnogr pniogr npiogr inpogr nipogr opignr poignr oipgnr iopgnr piognr ipognr opginr poginr ogpinr gopinr pgoinr gpoinr oigpnr iogpnr ogipnr goipnr igopnr giopnr pigonr ipgonr pgionr gpionr igponr giponr opngir pongir onpgir nopgir pnogir npogir opgnir pognir ogpnir gopnir pgonir gponir ongpir nogpir ognpir gonpir ngopir gnopir pngoir npgoir pgnoir gpnoir ngpoir gnpoir oingpr iongpr onigpr noigpr inogpr niogpr oignpr iognpr oginpr goinpr igonpr gionpr ongipr nogipr ognipr gonipr ngoipr gnoipr ingopr nigopr ignopr ginopr ngiopr gniopr pingor ipngor pnigor npigor inpgor nipgor pignor ipgnor pginor gpinor igpnor gipnor pngior npgior pgnior gpnior ngpior gnpior ingpor nigpor ignpor ginpor ngipor gnipor
Note: these 'words' (valid or invalid) are all the permutations of the word roping. These words are obtained by scrambling the letters in roping.